Agricultural non-point nitrogen pollution control function of different vegetation types in riparian wetlands: A case study in the Yellow River wetland in China

2009 ◽  
Vol 21 (7) ◽  
pp. 933-939 ◽  
Author(s):  
Tongqian ZHAO ◽  
Huashan XU ◽  
Yuxiao HE ◽  
Chao TAI ◽  
Hongqi MENG ◽  
...  
Keyword(s):  
Pollution Control ◽  
Yellow River ◽  
Control Function ◽  
Nitrogen Pollution ◽  
The Yellow River ◽  
Riparian Wetlands ◽  
Vegetation Types

The Study on Agricultural Non-Point Nitrogen Pollution Control

2012 ◽  
Vol 573-574 ◽  
pp. 213-217
Author(s):  
Gui Lan Zhang
Keyword(s):  
Pollution Control ◽  
Yellow River ◽  
Control Function ◽  
Nitrogen Pollution ◽  
Natural State ◽  
Runoff Water ◽  
Riparian Wetland ◽  
Temporal And Spatial ◽  
Runoff Events

Purification effects of riparian wetland in a natural state on pollutants are unstable and are always influenced by hydrology, climate, and extent of wetlands development. For this reason, study of the role of the purification function of riparian wetland in a natural state is ongoing. In this study, with the Kouma section of the Yellow River wetlands as the study area, using the field experiment method and the 15N enriched technique, the agricultural non-point nitrogen pollution control function of Phragmites communis Trin in riparian wetlands was studied. Artificial runoff events enabled the collection of a temporal and spatial array of samples within the wetland so that the plume of runoff water moving through the wetland could be traced and its attenuation determined.

scholarly journals Classification and Estimation of Irrigation Waters Based on Remote Sensing Images: Case Study in Yucheng City (China)

2018 ◽  
Vol 10 (10) ◽  
pp. 3503
Author(s):  
Qingshui Lu ◽  
Shangzhen Liang ◽  
Xinliang Xu
Keyword(s):  
Local Governments ◽  
Yellow River ◽  
Groundwater Depletion ◽  
The Yellow River ◽  
Chinese Government ◽  
Irrigation Season ◽  
Groundwater Supply ◽  
Yucheng City ◽  
Irrigation Waters

The downstream plain of the Yellow River is experiencing some of the most severe groundwater depletion in China. Although the Chinese government has issued policies to ensure that the Yellow River can provide enough irrigation waters for this region, groundwater levels continue to decrease. Yucheng City was selected as a case study. A new method was designed to classify the cropland into various irrigated cropland. Subsequently, we analyzed data regarding these irrigated-cropland categories, irrigation norms, and the minimum amount of irrigation water being applied to cropland. The results showed that 91.5% of farmland can be classified as double irrigated (by both canal/river and well water), while 8.5% of farmland can be classified as well irrigated. During the irrigation season, the sediments brought in by the river have blocked portions of the canals. This has led to 23% of the double-irrigated cropland being irrigated by groundwater, and it is thus a main factor causing reductions in groundwater supply. These blocked canals should be dredged by local governments to mitigate local groundwater depletion. The method for classifying irrigated cropland from high-resolution images is valid and it can be used in other irrigated areas with a declining groundwater table for the sustainable use of groundwater resources.

scholarly journals Distribution of phthalate esters in topsoil: a case study in the Yellow River Delta, China

2013 ◽  
Vol 185 (10) ◽  
pp. 8489-8500 ◽  
Author(s):  
Yang Hongjun ◽  
Xie Wenjun ◽  
Liu Qing ◽  
Liu Jingtao ◽  
Yu Hongwen ◽  
...  
Keyword(s):  
Yellow River ◽  
Phthalate Esters ◽  
Yellow River Delta ◽  
River Delta ◽  
The Yellow River ◽  
The Yellow River Delta
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